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charset=us-ascii Content-Disposition: inline Hi Suleiman, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common mirror-chromeos-5.10-arcvm head: f2a45e7307e73a366b48781aa253aec45ff1fd5a commit: 60159db699f14e547ce5ede2a7bad9b99e24cd3f [1/1] CHROMIUM: x86: rt: Avoid throttling over host suspend. config: arm-randconfig-003-20250122 (https://download.01.org/0day-ci/archive/20250123/202501230010.XY9Bfcf3-lkp@intel.com/config) compiler: arm-linux-gnueabi-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250123/202501230010.XY9Bfcf3-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-kbuild-all/202501230010.XY9Bfcf3-lkp@intel.com/ All errors (new ones prefixed by >>): kernel/sched/rt.c:260:6: warning: no previous prototype for 'free_rt_sched_group' [-Wmissing-prototypes] 260 | void free_rt_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~ kernel/sched/rt.c:262:5: warning: no previous prototype for 'alloc_rt_sched_group' [-Wmissing-prototypes] 262 | int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent) | ^~~~~~~~~~~~~~~~~~~~ kernel/sched/rt.c:675:6: warning: no previous prototype for 'sched_rt_bandwidth_account' [-Wmissing-prototypes] 675 | bool sched_rt_bandwidth_account(struct rt_rq *rt_rq) | ^~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/kernel.h:17, from include/asm-generic/bug.h:20, from arch/arm/include/asm/bug.h:60, from include/linux/bug.h:5, from include/linux/thread_info.h:12, from include/asm-generic/current.h:5, from ./arch/arm/include/generated/asm/current.h:1, from include/linux/sched.h:12, from kernel/sched/sched.h:5, from kernel/sched/rt.c:6: kernel/sched/rt.c: In function 'sched_rt_runtime_exceeded': >> kernel/sched/rt.c:982:50: error: 'struct rq' has no member named 'cpu' 982 | "(%ld)\n", rq_of_rt_rq(rt_rq)->cpu, rt_rq->rt_time); | ^~ include/linux/printk.h:460:40: note: in definition of macro 'printk_deferred_once' 460 | printk_deferred(fmt, ##__VA_ARGS__); \ | ^~~~~~~~~~~ vim +982 kernel/sched/rt.c 6f505b16425a51 kernel/sched_rt.c Peter Zijlstra 2008-01-25 955 9f0c1e560c4332 kernel/sched_rt.c Peter Zijlstra 2008-02-13 956 static int sched_rt_runtime_exceeded(struct rt_rq *rt_rq) 6f505b16425a51 kernel/sched_rt.c Peter Zijlstra 2008-01-25 957 { 9f0c1e560c4332 kernel/sched_rt.c Peter Zijlstra 2008-02-13 958 u64 runtime = sched_rt_runtime(rt_rq); fa85ae2418e684 kernel/sched_rt.c Peter Zijlstra 2008-01-25 959 fa85ae2418e684 kernel/sched_rt.c Peter Zijlstra 2008-01-25 960 if (rt_rq->rt_throttled) 23b0fdfc9299b1 kernel/sched_rt.c Peter Zijlstra 2008-02-13 961 return rt_rq_throttled(rt_rq); fa85ae2418e684 kernel/sched_rt.c Peter Zijlstra 2008-01-25 962 5b680fd61388ab kernel/sched/rt.c Shan Hai 2011-11-29 963 if (runtime >= sched_rt_period(rt_rq)) ac086bc22997a2 kernel/sched_rt.c Peter Zijlstra 2008-04-19 964 return 0; ac086bc22997a2 kernel/sched_rt.c Peter Zijlstra 2008-04-19 965 7def2be1dc6799 kernel/sched_rt.c Peter Zijlstra 2008-06-05 966 balance_runtime(rt_rq); ac086bc22997a2 kernel/sched_rt.c Peter Zijlstra 2008-04-19 967 runtime = sched_rt_runtime(rt_rq); 7def2be1dc6799 kernel/sched_rt.c Peter Zijlstra 2008-06-05 968 if (runtime == RUNTIME_INF) 7def2be1dc6799 kernel/sched_rt.c Peter Zijlstra 2008-06-05 969 return 0; ac086bc22997a2 kernel/sched_rt.c Peter Zijlstra 2008-04-19 970 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 971 /* 60159db699f14e kernel/sched/rt.c Suleiman Souhlal 2024-05-07 972 * XXX Temporary workaround for b/307775867 and b/336912980. 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 973 * We think we ran for this long because the host suspended while we 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 974 * were running, so just pretend we didn't run instead of throttling 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 975 * for a long time. 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 976 * The "5" was chosen so that it would be highly unlikely for this to 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 977 * happen in normal operation, while being small enough to be able to 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 978 * mitigate issues for shorter suspends. 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 979 */ 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 980 if (unlikely(runtime > 0 && rt_rq->rt_time >= 5 * runtime)) { 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 981 printk_deferred_once("suspected host suspend. cpu %d rt_time " 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 @982 "(%ld)\n", rq_of_rt_rq(rt_rq)->cpu, rt_rq->rt_time); 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 983 rt_rq->rt_time = 0; 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 984 } 4f653d6975381f kernel/sched/rt.c Suleiman Souhlal 2024-03-16 985 9f0c1e560c4332 kernel/sched_rt.c Peter Zijlstra 2008-02-13 986 if (rt_rq->rt_time > runtime) { 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 987 struct rt_bandwidth *rt_b = sched_rt_bandwidth(rt_rq); 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 988 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 989 /* 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 990 * Don't actually throttle groups that have no runtime assigned 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 991 * but accrue some time due to boosting. 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 992 */ 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 993 if (likely(rt_b->rt_runtime)) { 6f505b16425a51 kernel/sched_rt.c Peter Zijlstra 2008-01-25 994 rt_rq->rt_throttled = 1; c224815dac9c73 kernel/sched/rt.c John Stultz 2014-06-04 995 printk_deferred_once("sched: RT throttling activated\n"); bf3d991a7daad2 kernel/sched/rt.c Sai Harshini Nimmala 2020-11-02 996 bf3d991a7daad2 kernel/sched/rt.c Sai Harshini Nimmala 2020-11-02 997 trace_android_vh_dump_throttled_rt_tasks( bf3d991a7daad2 kernel/sched/rt.c Sai Harshini Nimmala 2020-11-02 998 raw_smp_processor_id(), bf3d991a7daad2 kernel/sched/rt.c Sai Harshini Nimmala 2020-11-02 999 rq_clock(rq_of_rt_rq(rt_rq)), bf3d991a7daad2 kernel/sched/rt.c Sai Harshini Nimmala 2020-11-02 1000 sched_rt_period(rt_rq), bf3d991a7daad2 kernel/sched/rt.c Sai Harshini Nimmala 2020-11-02 1001 runtime, bf3d991a7daad2 kernel/sched/rt.c Sai Harshini Nimmala 2020-11-02 1002 hrtimer_get_expires_ns(&rt_b->rt_period_timer)); 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 1003 } else { 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 1004 /* 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 1005 * In case we did anyway, make it go away, 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 1006 * replenishment is a joke, since it will replenish us 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 1007 * with exactly 0 ns. 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 1008 */ 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 1009 rt_rq->rt_time = 0; 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 1010 } 7abc63b1bd412f kernel/sched/rt.c Peter Zijlstra 2011-10-18 1011 23b0fdfc9299b1 kernel/sched_rt.c Peter Zijlstra 2008-02-13 1012 if (rt_rq_throttled(rt_rq)) { 9f0c1e560c4332 kernel/sched_rt.c Peter Zijlstra 2008-02-13 1013 sched_rt_rq_dequeue(rt_rq); fa85ae2418e684 kernel/sched_rt.c Peter Zijlstra 2008-01-25 1014 return 1; fa85ae2418e684 kernel/sched_rt.c Peter Zijlstra 2008-01-25 1015 } 23b0fdfc9299b1 kernel/sched_rt.c Peter Zijlstra 2008-02-13 1016 } fa85ae2418e684 kernel/sched_rt.c Peter Zijlstra 2008-01-25 1017 fa85ae2418e684 kernel/sched_rt.c Peter Zijlstra 2008-01-25 1018 return 0; fa85ae2418e684 kernel/sched_rt.c Peter Zijlstra 2008-01-25 1019 } fa85ae2418e684 kernel/sched_rt.c Peter Zijlstra 2008-01-25 1020 :::::: The code at line 982 was first introduced by commit :::::: 4f653d6975381f93075754c0d2b1ec8bc37b0df8 CHROMIUM: arm64: rt: Avoid throttling over host suspend. :::::: TO: Suleiman Souhlal :::::: CC: Chromeos LUCI -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki